US3951673A
Expired / Lapsed
US
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Inorganic hardening composition
Assignee: Asahi Kasei Corp
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Filing: 1974-11-12
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Granted: 1976-04-20
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Expires: 1994-11-12
Abstract
Abstract An inorganic hardening composition containing water glass and at least one of petalite and spodumene fired at a temperature of at least 1,000 DEG C has a high hardness, water resistance, incombustibility and fire resistance.
Inventors
- 👤 Susumu Isohata
- 👤 Kyoichi Sasaki
- 👤 Yoshihiro Minamitani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:21
CPC Classifications
C; C09; C09D; C09D1/00; C09D1/02; C03; C03C; C03C17/00; C03C17/22; C03C17/23; C03C17/25; C04; C04B; C04B20/00; C04B20/02; C04B20/04; C04B28/00; C04B28/24; C04B28/26; C04B37/00; C04B37/003; C04B37/005; C04B37/02; C04B37/023; C04B37/025; C04B37/04; C04B37/045; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/23; C03C2218/00; C03C2218/10; C03C2218/11; C03C2218/114; C03C2218/118; C04B2237/00; C04B2237/02; C04B2237/04; C04B2237/06; C04B2237/062; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/341; C04B2237/40; C04B2237/402; C04B2237/405; C04B2237/406; C04B2237/50; C04B2237/52; C04B2237/525; C04B2237/55
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
51 words
An inorganic hardening composition comprising water glass and at least one member selected from the group consisting of petalite and spodumene which have been fired at a temperature of at least 1,000°C, wherein the proportion of the water glass to the petalite and/or spodumene is 100 parts: 300 - 10 parts.
Claim 2
Dependent Claim
51 words
An inorganic hardening composition comprising water glass and at least one member selected from the group consisting of petalite and spodumene which have been fired at a temperature of at least 1,000°C, wherein the proportion of the water glass to the petalite and/or spodumene is 100 parts: 300 - 10 parts.
Claim 3
Dependent Claim
33 words
An inorganic hardening composition according to claim 1, wherein the water glass consists essentially of aqueous solutions of alkali silicates selected from the group consisting of sodium silicate, potassium silicate, and lithium silicate.
Claim 4
Dependent Claim
30 words
An inorganic hardening composition according to claim 2, wherein the molar ratio of SiO 2 and alkali metal oxide in the water glass is 2 : 1 - : 1.
Claim 5
Dependent Claim
22 words
An organic hardening composition according to claim 1, wherein the petalite and spodumene have a grain size of 1 - 100 μ.
Claim 6
Dependent Claim
27 words
An inorganic hardening composition according to claim 1, wherein the petalite and/or spodumene used are those which have been heated to a temperature of higher than 1,100°C.
Claim 7
Dependent Claim
23 words
An inorganic hardening composition according to claim 2, wherein the solution contains 20 - 50% by weight of alkali silicate in solid content.
References Cited (Backward Citations)
US3222197A
Cited
US3832195A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-20 | 1979-10-20 | 1980-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-20 | 1983-10-20 | 1984-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-20 | 1987-10-20 | 1988-04-20 | $7700.00 | Window Closed / Lapsed |